Printing- Rice Bags

Following are some pictures of rice bags i think they are called polypropelene bags, not sure though
i have been given a project to design such a bag

i want to know wht color settings shoudl i set in photoshop? because i think theres some color limitation in the prinitng process.

also in these pictures if u notice i think theres some color limitation. specially if u have a look at the ones which are not laminated. i want to design such a bag (last two pictures)

please help me out and if u guys have any idea related to the design of new printing material then share that too plz.
thanks

Zohaib said:

Following are some pictures of rice bags i think they are called polypropelene bags, not sure though
i have been given a project to design such a bag

i want to know wht color settings shoudl i set in photoshop? because i think theres some color limitation in the prinitng process.

also in these pictures if u notice i think theres some color limitation. specially if u have a look at the ones which are not laminated. i want to design such a bag (last two pictures)

please help me out and if u guys have any idea related to the design of new printing material then share that too plz.
thanks

Click to expand...

Ideally, you should be using Illustrator for this, not Photoshop.
Use Pantone Spot colors to create your design. All graphics should be vector.
Create your design based on the actual size of the bag.

If you must use Photoshop then the colors will not matter because the job will print in CMYK process. Create your design based on the actual size of the bag at 300 ppi.

Mike

If I understand correctly, the ones you describe as "not laminated" are made of a pre-coloured material, and then over-printed in one or two colours? This is probably best done by a vector (line art) method if possible, since it is likely that the final artwork will be required in vector - not bitmap pixel - format.

Vector working avoids awkward questions of pixel resolution. However if you are starting from photographic material, you will still need to find a vectorising method that achieves a very clear vector representation as quite simple shapes of solid colour. If doesn't look to me as if complex shading of the ink colour is going to be feasible - at best a very large halftone dot, which will print unevenly onto the textured bag. A stencil-type (all hard edged) design will show up most legibly with this kind of printing. Commercial trademarks and logos are likely to have been hand-tweaked inside the vector editor, not just run through a vector conversion program.

While the best known program for vector editing is (probably) Illustrator, Photoshop can also have vector masked layers (and text layers are already vector in nature). There are other low cost options and this kind of task may wander into desktop publishing terriotory, depending on the nature of the design.

It will be necessary in planning your design to consider the base colour of the bag material that will be overprinted, and to simulate or softproof that on screen when you are evaluating and developing your design; also to try to show the effect of show-through on the printing inks themselves. Perhaps a colour fill layer, then a couple of vector layers (with vector mask) overlaid, one per ink colour, each with a suitably reduced opacity and/or a suitable layer blending mode - all to "mock up" the eventual printed item.

Then for the artwork you could make separations: effectively, a plain flat copy of each vector mask, to be used for making a screen or plate for printing each individual spot ink.

The tools for drawing on and modifying a vectore layer mask are rather different to normal bitmap editing tools, but are soon learnt from tutorials, books or even the Photoshop help system.

regards, RP

Talk to your preferred vendor. While the advice here is sound, understand that vendors (the person who will produce the product for you) vary and they do not all accept the same thing.

For instance, someone mentioned Pantone, that's just one of many standards and it's not necessarily true that rice bags are printed using Pantone colors. They can be converted, but you may be charged for the conversion. Speak to the printer and ask them what file type they accept, what color standards they prefer, what resolution they require, etc. They should be your first stop.

--
Thanks,
Magic Captain Mario